期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.227202
关键词
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资金
- Slovenian Research Agency [J1-2118]
- Swiss National Science Foundation [200021-129899]
- European Commission [283883, CP-CSA_INFRA-2008-1.1.1, 226507-NMI3]
- Swiss National Science Foundation (SNF) [200021_129899] Funding Source: Swiss National Science Foundation (SNF)
An incommensurate elliptical helical magnetic structure in the frustrated coupled-spin-chain system FeTe2O5Br is surprisingly found to persist down to 53(3) mK (T/T-N similar to 1/200), according to neutron scattering and muon spin relaxation. In this state, finite spin fluctuations at T -> 0 are evidenced by muon depolarization, which is in agreement with specific-heat data indicating the presence of both gapless and gapped excitations. We thus show that the amplitude-modulated magnetic order intrinsically accommodates contradictory persistent spin dynamics and long-range order and can serve as a model structure to investigate their coexistence.
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